On 4 Jul 2014, at 02:28, Jon Elson wrote: > On 07/03/2014 04:18 PM, Gene Heskett wrote: >> >> But it occurs to me that this code is dig cutting, meaning the bit as it >> dulls, will skid rather than shave at first contact and be pushed farther >> and farther off the line until it snaps. > I have been climb milling since 1997, when I got ballscrews > on the > machine. I almost never conventional mill, as it leads to more > wear on the cutter, and massively worse surface finish on > aluminum. >
I certainly agree with that. I typically rough out using conventional milling and cutters designed specifically for aluminium, then finish with a climb cut. Increasingly, though, I do the roughing cuts using climb milling too. Finishing with a climb cut produces a mirror-like finish that needs no further work. The only fly in the ointment is backlash, even on ballscrews, where climb milling tends to reveal any tendency for the nut to 'float' on the screw as the feed changes direction. If the cutter is long, and its in full contact with the work (e.g. a 40mm long cutter with 38mm in contact with the work (not taking a 38mm deep cut all at once, of course) it can leave a mark on the work. Double ballnuts might solve that. See the photo currently at www.cncintheworkshop.com/Welcome.html for example. The top of the yoke was flycut, but the sides are 38mm deep and cut with an end mill. It goes straight to the platers to be gold plated. Marcus > Jon > > ------------------------------------------------------------------------------ > Open source business process management suite built on Java and Eclipse > Turn processes into business applications with Bonita BPM Community Edition > Quickly connect people, data, and systems into organized workflows > Winner of BOSSIE, CODIE, OW2 and Gartner awards > http://p.sf.net/sfu/Bonitasoft > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
